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“Weirdness” in collected charge and additional irradiation plans. Anthony Affolder University of Liverpool. Weirdness in C ollected Charge. +5-10%. +30-35%. “Normal” Annealing. +5-10%. “Weird” Annealing. ATLAS12 neutron and proton irradiated devices anneal differently

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weirdness in collected charge and additional irradiation plans

“Weirdness” in collected charge and additional irradiation plans

Anthony Affolder

University of Liverpool

weirdness in c ollected charge
Weirdness in Collected Charge

+5-10%

+30-35%

“Normal” Annealing

+5-10%

“Weird” Annealing

  • ATLAS12 neutron and proton irradiated devices anneal differently
    • Don’t believe ATLAS07 had this difference
  • Not clear how ATLAS07 and ATLAS12 compare in detail
    • Normalization was performed differently as we were unaware of thickness of backplane connection (~7% effect)
  • Would like to understand both things to help in definition of final spec
irradiation plan
Irradiation Plan
  • Want to compare ATLAS07/12 before/after annealing after proton/neutron irradiation
  • Plan is to irradiate sets of 4 ATLAS07 + 4 ATLAS12 minis at the same time to 2 doses (5e14, 1e15) at both Ljubljana and Birmingham
    • The parts for Ljubljana are being sent
    • Measurement plan is to measure each before and after annealing at DESY, Liverpool and Ljubljana
      • One extra set available if anyone interested
  • Should give clear comparisons between ATLAS07/ATLAS12, protons/neutrons, ad pre/post annealing for specs and confidence in new sensors